I have a relatively new Vivitar "point & shoot" camera (model PZ3115)from my mother estate. The camera works fine except for one big problem. The viewfinder does not work with the zoom lens. Specifically - a subject viewed through the viewfinder does not change in size when the zoom lens is used. Any suggestions on fixing this problem? I know this is not a "classic" camera, but I am hoping someone can give me some help.